diff --git a/src/ffi.rs b/src/ffi.rs
index 88c9529..b02f79f 100644
--- a/src/ffi.rs
+++ b/src/ffi.rs
@@ -132,7 +132,7 @@ pub fn dispatch_get_main_queue() -> dispatch_queue_t {
 }
 
 pub const DISPATCH_QUEUE_SERIAL: dispatch_queue_attr_t = 0 as dispatch_queue_attr_t;
-pub static DISPATCH_QUEUE_CONCURRENT: dispatch_queue_attr_t = &_dispatch_queue_attr_concurrent;
+pub static DISPATCH_QUEUE_CONCURRENT: &'static dispatch_object_s = &_dispatch_queue_attr_concurrent;
 
 pub const DISPATCH_QUEUE_PRIORITY_HIGH: c_long       = 2;
 pub const DISPATCH_QUEUE_PRIORITY_DEFAULT: c_long    = 0;